Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“enhance pressure sensitivity for pens & add fountain pen”

Checks (re-run on this request)

• ✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
• ✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
• ✓ Public transparency log — Sigstore Rekor log index 2514188040

Proof data

Record hash (SHA-256)

9a9848012b1e773a4ab2a86c35cdcfcc62c5ff9958d7535ec44dcc3cf471715d

Signature (Ed25519, base64)

ubNV2hN0oiS7QLzoEowjVF4jhO+lGDDCD0xEXbcjM67hJWGgM4Kxse7adXTB7f528OCSLzP3MnIzxC3E/g65DA==

Merkle root

6189a42bfe294c4034f316d047a716a5efecb511b8dbe64c4f7f543872c9bcee

Merkle path

["9a979b270b600ae3f95826af84e0f543933bbcf453e00724abcf64580aba290d","e3ead92cd1f68b714c95b89d7db9b4ac60eba82bf5d713e674e90e7b987677d2","dc4e9556504643f6c1c7e920a531ca377837f488cf604d661f206af187a89397","c11f49a7080c319c7082d30f89e009870113b9b834d412f6ed1f8acd76f3b008","2ea70b2c5e3207717c53c95f46c034f6e2d6918dc34f73b92a57a3b99cd5c55b","19adeacec349fcb9f1344be5e1420f056a3a85420ca8b1f4c86f4c6bb86d2b0e","f5a23202731020337c0375a496f62608f330c68ee1c5e56b53aa3d41bc617c61","f87680d0ae80e11ac115a3d17d2ae6acb161568baa25844652a08c6cdbde4380","a13f3be3740150762ec9559f2d710944b5f7e7b6d28bb506c7bec4ce38cf9303","d5baf70db63633ec4f5f2d27552facd7885aac8dec357d68488aab39b0c62395","a998c61e37b0a762b0b72f1088898ab4479431d742386f4611d1b959d06c6915","dd49ffed5706509addf3a931f27e8b6f7675e0560bb610987c1af5f77a14b3a0","8b1224b2d8406510f0bc8243984d0efc746bc1407d5fb93d79122fcf91f7bc98","67223d7a85c1115e9dde948af20504ca3bc62c9ea97637792b53682f25f6d8d4","e36acd56aebd26af88e4e41e8d5bc2a1389f049dd914bc2c3da8d68ac2fede4b"]

Anchored

2026-08-19

Public log entry

search.sigstore.dev, log index 2514188040 · entry 108e9186e8c5677ac9bd…

Expected log hash

b0fc1d11450dfeabf778635bd8a8264987fbb7e682331541ce1f5d7507d4e862 The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.

Canonical record

{"dataset_version":"v1787125125654","kind":"published-quote","locale":"en","page":"theme:xodo/fit/en","quote":"enhance pressure sensitivity for pens & add fountain pen","rating":4,"review_date":"2026-04-02","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.xodo.pdf.reader","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (6189a42bfe29…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.